REPORTED DECLINE

40%

UP TO

A number of scientific studies have reported a marked reduction in the levels of some nutrients in a variety of major crops over the past 60 years.

In one British study, researchers compared the mineral composition of historical grain collections over a 160 period. They found that while between 1846 and the mid 1960's mineral content remained stable, since that period some key nutrients have seen a significant decrease. This fall coincided with the introduction of high-yielding cultivars.

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INCA BERRIES

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NEW ZEALAND YAMS

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COPYRIGHT JAMES WONG 2015

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Based on the most cutting edge scientific research, my new bestselling RHS book reveals the secrets to growing crops for measurably improved flavour and nutrition. Translating the geek speak into tips & tricks means anyone can grow

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